mirror of
https://gitlab.com/xonotic/xonotic
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add a normalmap to heightmap tool by me
This commit is contained in:
Rudolf Polzer
parent
905a0767d6
commit
c151bbe676
719
misc/tools/fft-normalmap-to-heightmap.c
Normal file
719
misc/tools/fft-normalmap-to-heightmap.c
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@ -0,0 +1,719 @@
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/*
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* FFT based normalmap to heightmap converter
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* Copyright (C) 2010 Rudolf Polzer
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#undef C99
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#if __STDC_VERSION__ >= 199901L
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#define C99
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#endif
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#ifdef C99
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#include <complex.h>
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <math.h>
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#include <fftw3.h>
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void nmap_to_hmap(unsigned char *map, int w, int h, double scale, double offset)
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{
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int x, y;
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double nx, ny, nz;
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double v, vmin, vmax;
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#ifndef C99
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double save;
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#endif
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fftw_complex *imgspace1 = fftw_malloc(w*h * sizeof(fftw_complex));
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fftw_complex *imgspace2 = fftw_malloc(w*h * sizeof(fftw_complex));
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fftw_complex *freqspace1 = fftw_malloc(w*h * sizeof(fftw_complex));
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fftw_complex *freqspace2 = fftw_malloc(w*h * sizeof(fftw_complex));
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fftw_plan i12f1 = fftw_plan_dft_2d(w, h, imgspace1, freqspace1, FFTW_FORWARD, FFTW_ESTIMATE);
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fftw_plan i22f2 = fftw_plan_dft_2d(w, h, imgspace2, freqspace2, FFTW_FORWARD, FFTW_ESTIMATE);
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fftw_plan f12i1 = fftw_plan_dft_2d(w, h, freqspace1, imgspace1, FFTW_BACKWARD, FFTW_ESTIMATE);
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for(y = 0; y < h; ++y)
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for(x = 0; x < w; ++x)
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{
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/*
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* unnormalized normals:
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* n_x = -dh/dx
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* n_y = -dh/dy
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* n_z = -dh/dh = -1
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* BUT: darkplaces uses inverted normals, n_y actually is dh/dy by image pixel coordinates
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*/
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nx = (int)map[(w*y+x)*4+2] - 127.5;
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ny = (int)map[(w*y+x)*4+1] - 127.5;
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nz = (int)map[(w*y+x)*4+0] - 127.5;
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/* reconstruct the derivatives from here */
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#ifdef C99
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imgspace1[(w*y+x)] = nx / nz; /* = dz/dx */
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imgspace2[(w*y+x)] = -ny / nz; /* = dz/dy */
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#else
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imgspace1[(w*y+x)][0] = nx / nz; /* = dz/dx */
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imgspace1[(w*y+x)][1] = 0;
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imgspace2[(w*y+x)][0] = -ny / nz; /* = dz/dy */
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imgspace2[(w*y+x)][1] = 0;
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#endif
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}
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/* see http://www.gamedev.net/community/forums/topic.asp?topic_id=561430 */
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fftw_execute(i12f1);
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fftw_execute(i22f2);
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for(y = 0; y < h; ++y)
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for(x = 0; x < w; ++x)
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{
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int fx = x;
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int fy = y;
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if(fx > w/2)
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fx -= w;
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if(fy > h/2)
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fy -= h;
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#ifdef C99
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if(fx||fy)
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freqspace1[(w*y+x)] = I * (fx * freqspace1[(w*y+x)] + fy * freqspace2[(w*y+x)]) / (fx*fx + fy*fy);
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else
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freqspace1[(w*y+x)] = 0;
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#else
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if(fx||fy)
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{
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save = freqspace1[(w*y+x)][0];
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freqspace1[(w*y+x)][0] = -(fx * freqspace1[(w*y+x)][1] + fy * freqspace2[(w*y+x)][1]) / (fx*fx + fy*fy);
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freqspace1[(w*y+x)][1] = (fx * save + fy * freqspace2[(w*y+x)][0]) / (fx*fx + fy*fy);
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}
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else
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{
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freqspace1[(w*y+x)][0] = 0;
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freqspace1[(w*y+x)][1] = 0;
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}
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#endif
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}
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fftw_execute(f12i1);
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if(scale == 0)
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{
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#ifdef C99
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vmin = vmax = creal(imgspace1[0]);
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#else
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vmin = vmax = imgspace1[0][0];
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#endif
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for(y = 0; y < h; ++y)
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for(x = 0; x < w; ++x)
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{
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#ifdef C99
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v = creal(imgspace1[(w*y+x)]);
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#else
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v = imgspace1[(w*y+x)][0];
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#endif
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if(v < vmin)
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vmin = v;
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if(v > vmax)
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vmax = v;
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}
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vmin /= (w*h);
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vmax /= (w*h);
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/*
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* map vmin to -1
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* map vmax to +1
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*/
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scale = 2 / (vmax - vmin);
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offset = -(vmax + vmin) / (vmax - vmin);
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printf("Autocomputed scale: %f\nAutocomputed offset: %f\n", scale, offset);
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}
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scale /= (w*h);
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for(y = 0; y < h; ++y)
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for(x = 0; x < w; ++x)
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{
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#ifdef C99
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v = creal(imgspace1[(w*y+x)]);
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#else
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v = imgspace1[(w*y+x)][0];
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#endif
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v = v * scale + offset;
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if(v < -1)
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v = -1;
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if(v > 1)
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v = 1;
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/*
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map[(w*y+x)*4+0] = 128 + 127 * v;
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map[(w*y+x)*4+1] = 128 + 127 * v;
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map[(w*y+x)*4+2] = 128 + 127 * v;
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map[(w*y+x)*4+3] = 255;
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*/
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map[(w*y+x)*4+3] = floor(128.5 + 127 * v);
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}
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fftw_destroy_plan(i12f1);
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fftw_destroy_plan(i22f2);
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fftw_destroy_plan(f12i1);
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fftw_free(freqspace2);
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fftw_free(freqspace1);
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fftw_free(imgspace2);
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fftw_free(imgspace1);
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}
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unsigned char *FS_LoadFile(const char *fn, int *len)
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{
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unsigned char *buf = NULL;
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int n;
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FILE *f = fopen(fn, "rb");
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*len = 0;
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if(!f)
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return NULL;
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for(;;)
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{
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buf = realloc(buf, *len + 65536);
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if(!buf)
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{
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fclose(f);
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free(buf);
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*len = 0;
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return NULL;
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}
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n = fread(buf + *len, 1, 65536, f);
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if(n < 0)
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{
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fclose(f);
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free(buf);
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*len = 0;
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return NULL;
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}
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*len += n;
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if(n < 65536)
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break;
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}
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return buf;
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}
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int FS_WriteFile(const char *fn, unsigned char *data, int len)
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{
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FILE *f = fopen(fn, "wb");
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if(!f)
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return 0;
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if(fwrite(data, len, 1, f) != 1)
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{
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fclose(f);
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return 0;
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}
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if(fclose(f))
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return 0;
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return 1;
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}
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/* START stuff that originates from image.c in DarkPlaces */
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int image_width, image_height;
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typedef struct _TargaHeader
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{
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unsigned char id_length, colormap_type, image_type;
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unsigned short colormap_index, colormap_length;
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unsigned char colormap_size;
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unsigned short x_origin, y_origin, width, height;
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unsigned char pixel_size, attributes;
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}
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TargaHeader;
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void PrintTargaHeader(TargaHeader *t)
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{
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printf("TargaHeader:\nuint8 id_length = %i;\nuint8 colormap_type = %i;\nuint8 image_type = %i;\nuint16 colormap_index = %i;\nuint16 colormap_length = %i;\nuint8 colormap_size = %i;\nuint16 x_origin = %i;\nuint16 y_origin = %i;\nuint16 width = %i;\nuint16 height = %i;\nuint8 pixel_size = %i;\nuint8 attributes = %i;\n", t->id_length, t->colormap_type, t->image_type, t->colormap_index, t->colormap_length, t->colormap_size, t->x_origin, t->y_origin, t->width, t->height, t->pixel_size, t->attributes);
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}
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unsigned char *LoadTGA_BGRA (const unsigned char *f, int filesize)
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{
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int x, y, pix_inc, row_inci, runlen, alphabits;
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unsigned char *image_buffer;
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unsigned int *pixbufi;
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const unsigned char *fin, *enddata;
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TargaHeader targa_header;
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unsigned int palettei[256];
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union
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{
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unsigned int i;
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unsigned char b[4];
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}
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bgra;
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if (filesize < 19)
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return NULL;
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enddata = f + filesize;
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targa_header.id_length = f[0];
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targa_header.colormap_type = f[1];
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targa_header.image_type = f[2];
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targa_header.colormap_index = f[3] + f[4] * 256;
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targa_header.colormap_length = f[5] + f[6] * 256;
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targa_header.colormap_size = f[7];
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targa_header.x_origin = f[8] + f[9] * 256;
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targa_header.y_origin = f[10] + f[11] * 256;
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targa_header.width = image_width = f[12] + f[13] * 256;
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targa_header.height = image_height = f[14] + f[15] * 256;
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targa_header.pixel_size = f[16];
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targa_header.attributes = f[17];
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if (image_width > 32768 || image_height > 32768 || image_width <= 0 || image_height <= 0)
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{
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printf("LoadTGA: invalid size\n");
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PrintTargaHeader(&targa_header);
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return NULL;
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}
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/* advance to end of header */
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fin = f + 18;
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/* skip TARGA image comment (usually 0 bytes) */
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fin += targa_header.id_length;
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/* read/skip the colormap if present (note: according to the TARGA spec it */
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/* can be present even on 1color or greyscale images, just not used by */
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/* the image data) */
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if (targa_header.colormap_type)
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{
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if (targa_header.colormap_length > 256)
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{
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printf("LoadTGA: only up to 256 colormap_length supported\n");
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PrintTargaHeader(&targa_header);
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return NULL;
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}
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if (targa_header.colormap_index)
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{
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printf("LoadTGA: colormap_index not supported\n");
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PrintTargaHeader(&targa_header);
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return NULL;
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}
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if (targa_header.colormap_size == 24)
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{
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for (x = 0;x < targa_header.colormap_length;x++)
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{
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bgra.b[0] = *fin++;
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bgra.b[1] = *fin++;
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bgra.b[2] = *fin++;
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bgra.b[3] = 255;
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palettei[x] = bgra.i;
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}
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}
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else if (targa_header.colormap_size == 32)
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{
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memcpy(palettei, fin, targa_header.colormap_length*4);
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fin += targa_header.colormap_length * 4;
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}
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else
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{
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printf("LoadTGA: Only 32 and 24 bit colormap_size supported\n");
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PrintTargaHeader(&targa_header);
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return NULL;
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}
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}
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/* check our pixel_size restrictions according to image_type */
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switch (targa_header.image_type & ~8)
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{
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case 2:
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if (targa_header.pixel_size != 24 && targa_header.pixel_size != 32)
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{
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printf("LoadTGA: only 24bit and 32bit pixel sizes supported for type 2 and type 10 images\n");
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PrintTargaHeader(&targa_header);
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return NULL;
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}
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break;
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case 3:
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/* set up a palette to make the loader easier */
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for (x = 0;x < 256;x++)
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{
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bgra.b[0] = bgra.b[1] = bgra.b[2] = x;
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bgra.b[3] = 255;
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palettei[x] = bgra.i;
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}
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/* fall through to colormap case */
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case 1:
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if (targa_header.pixel_size != 8)
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{
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printf("LoadTGA: only 8bit pixel size for type 1, 3, 9, and 11 images supported\n");
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PrintTargaHeader(&targa_header);
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return NULL;
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}
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break;
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default:
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printf("LoadTGA: Only type 1, 2, 3, 9, 10, and 11 targa RGB images supported, image_type = %i\n", targa_header.image_type);
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PrintTargaHeader(&targa_header);
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return NULL;
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}
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if (targa_header.attributes & 0x10)
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{
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printf("LoadTGA: origin must be in top left or bottom left, top right and bottom right are not supported\n");
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return NULL;
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}
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/* number of attribute bits per pixel, we only support 0 or 8 */
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alphabits = targa_header.attributes & 0x0F;
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if (alphabits != 8 && alphabits != 0)
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{
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printf("LoadTGA: only 0 or 8 attribute (alpha) bits supported\n");
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return NULL;
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}
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image_buffer = (unsigned char *)malloc(image_width * image_height * 4);
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if (!image_buffer)
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{
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printf("LoadTGA: not enough memory for %i by %i image\n", image_width, image_height);
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return NULL;
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}
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/* If bit 5 of attributes isn't set, the image has been stored from bottom to top */
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if ((targa_header.attributes & 0x20) == 0)
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{
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pixbufi = (unsigned int*)image_buffer + (image_height - 1)*image_width;
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row_inci = -image_width*2;
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}
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else
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{
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pixbufi = (unsigned int*)image_buffer;
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row_inci = 0;
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}
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x = 0;
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y = 0;
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pix_inc = 1;
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if ((targa_header.image_type & ~8) == 2)
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pix_inc = (targa_header.pixel_size + 7) / 8;
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switch (targa_header.image_type)
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{
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case 1: /* colormapped, uncompressed */
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case 3: /* greyscale, uncompressed */
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if (fin + image_width * image_height * pix_inc > enddata)
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break;
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for (y = 0;y < image_height;y++, pixbufi += row_inci)
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for (x = 0;x < image_width;x++)
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*pixbufi++ = palettei[*fin++];
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break;
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case 2:
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/* BGR or BGRA, uncompressed */
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if (fin + image_width * image_height * pix_inc > enddata)
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break;
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if (targa_header.pixel_size == 32 && alphabits)
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{
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for (y = 0;y < image_height;y++)
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memcpy(pixbufi + y * (image_width + row_inci), fin + y * image_width * pix_inc, image_width*4);
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}
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else
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{
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for (y = 0;y < image_height;y++, pixbufi += row_inci)
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{
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for (x = 0;x < image_width;x++, fin += pix_inc)
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{
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bgra.b[0] = fin[0];
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bgra.b[1] = fin[1];
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bgra.b[2] = fin[2];
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bgra.b[3] = 255;
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*pixbufi++ = bgra.i;
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}
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}
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}
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break;
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case 9: /* colormapped, RLE */
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case 11: /* greyscale, RLE */
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for (y = 0;y < image_height;y++, pixbufi += row_inci)
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{
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for (x = 0;x < image_width;)
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{
|
||||
if (fin >= enddata)
|
||||
break; /* error - truncated file */
|
||||
runlen = *fin++;
|
||||
if (runlen & 0x80)
|
||||
{
|
||||
/* RLE - all pixels the same color */
|
||||
runlen += 1 - 0x80;
|
||||
if (fin + pix_inc > enddata)
|
||||
break; /* error - truncated file */
|
||||
if (x + runlen > image_width)
|
||||
break; /* error - line exceeds width */
|
||||
bgra.i = palettei[*fin++];
|
||||
for (;runlen--;x++)
|
||||
*pixbufi++ = bgra.i;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* uncompressed - all pixels different color */
|
||||
runlen++;
|
||||
if (fin + pix_inc * runlen > enddata)
|
||||
break; /* error - truncated file */
|
||||
if (x + runlen > image_width)
|
||||
break; /* error - line exceeds width */
|
||||
for (;runlen--;x++)
|
||||
*pixbufi++ = palettei[*fin++];
|
||||
}
|
||||
}
|
||||
|
||||
if (x != image_width)
|
||||
{
|
||||
/* pixbufi is useless now */
|
||||
printf("LoadTGA: corrupt file\n");
|
||||
break;
|
||||
}
|
||||
}
|
||||
break;
|
||||
case 10:
|
||||
/* BGR or BGRA, RLE */
|
||||
if (targa_header.pixel_size == 32 && alphabits)
|
||||
{
|
||||
for (y = 0;y < image_height;y++, pixbufi += row_inci)
|
||||
{
|
||||
for (x = 0;x < image_width;)
|
||||
{
|
||||
if (fin >= enddata)
|
||||
break; /* error - truncated file */
|
||||
runlen = *fin++;
|
||||
if (runlen & 0x80)
|
||||
{
|
||||
/* RLE - all pixels the same color */
|
||||
runlen += 1 - 0x80;
|
||||
if (fin + pix_inc > enddata)
|
||||
break; /* error - truncated file */
|
||||
if (x + runlen > image_width)
|
||||
break; /* error - line exceeds width */
|
||||
bgra.b[0] = fin[0];
|
||||
bgra.b[1] = fin[1];
|
||||
bgra.b[2] = fin[2];
|
||||
bgra.b[3] = fin[3];
|
||||
fin += pix_inc;
|
||||
for (;runlen--;x++)
|
||||
*pixbufi++ = bgra.i;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* uncompressed - all pixels different color */
|
||||
runlen++;
|
||||
if (fin + pix_inc * runlen > enddata)
|
||||
break; /* error - truncated file */
|
||||
if (x + runlen > image_width)
|
||||
break; /* error - line exceeds width */
|
||||
for (;runlen--;x++)
|
||||
{
|
||||
bgra.b[0] = fin[0];
|
||||
bgra.b[1] = fin[1];
|
||||
bgra.b[2] = fin[2];
|
||||
bgra.b[3] = fin[3];
|
||||
fin += pix_inc;
|
||||
*pixbufi++ = bgra.i;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (x != image_width)
|
||||
{
|
||||
/* pixbufi is useless now */
|
||||
printf("LoadTGA: corrupt file\n");
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
for (y = 0;y < image_height;y++, pixbufi += row_inci)
|
||||
{
|
||||
for (x = 0;x < image_width;)
|
||||
{
|
||||
if (fin >= enddata)
|
||||
break; /* error - truncated file */
|
||||
runlen = *fin++;
|
||||
if (runlen & 0x80)
|
||||
{
|
||||
/* RLE - all pixels the same color */
|
||||
runlen += 1 - 0x80;
|
||||
if (fin + pix_inc > enddata)
|
||||
break; /* error - truncated file */
|
||||
if (x + runlen > image_width)
|
||||
break; /* error - line exceeds width */
|
||||
bgra.b[0] = fin[0];
|
||||
bgra.b[1] = fin[1];
|
||||
bgra.b[2] = fin[2];
|
||||
bgra.b[3] = 255;
|
||||
fin += pix_inc;
|
||||
for (;runlen--;x++)
|
||||
*pixbufi++ = bgra.i;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* uncompressed - all pixels different color */
|
||||
runlen++;
|
||||
if (fin + pix_inc * runlen > enddata)
|
||||
break; /* error - truncated file */
|
||||
if (x + runlen > image_width)
|
||||
break; /* error - line exceeds width */
|
||||
for (;runlen--;x++)
|
||||
{
|
||||
bgra.b[0] = fin[0];
|
||||
bgra.b[1] = fin[1];
|
||||
bgra.b[2] = fin[2];
|
||||
bgra.b[3] = 255;
|
||||
fin += pix_inc;
|
||||
*pixbufi++ = bgra.i;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (x != image_width)
|
||||
{
|
||||
/* pixbufi is useless now */
|
||||
printf("LoadTGA: corrupt file\n");
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
break;
|
||||
default:
|
||||
/* unknown image_type */
|
||||
break;
|
||||
}
|
||||
|
||||
return image_buffer;
|
||||
}
|
||||
|
||||
int Image_WriteTGABGRA (const char *filename, int width, int height, const unsigned char *data)
|
||||
{
|
||||
int y;
|
||||
unsigned char *buffer, *out;
|
||||
const unsigned char *in, *end;
|
||||
int ret;
|
||||
|
||||
buffer = (unsigned char *)malloc(width*height*4 + 18);
|
||||
|
||||
memset (buffer, 0, 18);
|
||||
buffer[2] = 2; /* uncompressed type */
|
||||
buffer[12] = (width >> 0) & 0xFF;
|
||||
buffer[13] = (width >> 8) & 0xFF;
|
||||
buffer[14] = (height >> 0) & 0xFF;
|
||||
buffer[15] = (height >> 8) & 0xFF;
|
||||
|
||||
for (y = 3;y < width*height*4;y += 4)
|
||||
if (data[y] < 255)
|
||||
break;
|
||||
|
||||
if (y < width*height*4)
|
||||
{
|
||||
/* save the alpha channel */
|
||||
buffer[16] = 32; /* pixel size */
|
||||
buffer[17] = 8; /* 8 bits of alpha */
|
||||
|
||||
/* flip upside down */
|
||||
out = buffer + 18;
|
||||
for (y = height - 1;y >= 0;y--)
|
||||
{
|
||||
memcpy(out, data + y * width * 4, width * 4);
|
||||
out += width*4;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
/* save only the color channels */
|
||||
buffer[16] = 24; /* pixel size */
|
||||
buffer[17] = 0; /* 8 bits of alpha */
|
||||
|
||||
/* truncate bgra to bgr and flip upside down */
|
||||
out = buffer + 18;
|
||||
for (y = height - 1;y >= 0;y--)
|
||||
{
|
||||
in = data + y * width * 4;
|
||||
end = in + width * 4;
|
||||
for (;in < end;in += 4)
|
||||
{
|
||||
*out++ = in[0];
|
||||
*out++ = in[1];
|
||||
*out++ = in[2];
|
||||
}
|
||||
}
|
||||
}
|
||||
ret = FS_WriteFile (filename, buffer, out - buffer);
|
||||
|
||||
free(buffer);
|
||||
|
||||
return ret;
|
||||
}
|
||||
/* START stuff that originates from image.c in DarkPlaces */
|
||||
|
||||
int usage(const char *me)
|
||||
{
|
||||
printf("Usage: %s <infile.tga> <outfile.tga> [<scale> [<offset>]]\n", me);
|
||||
return 1;
|
||||
}
|
||||
|
||||
int main(int argc, char **argv)
|
||||
{
|
||||
const char *infile, *outfile;
|
||||
double scale, offset;
|
||||
int nmaplen;
|
||||
unsigned char *nmapdata, *nmap;
|
||||
|
||||
if(argc > 1)
|
||||
infile = argv[1];
|
||||
else
|
||||
return usage(*argv);
|
||||
|
||||
if(argc > 2)
|
||||
outfile = argv[2];
|
||||
else
|
||||
return usage(*argv);
|
||||
|
||||
if(argc > 3)
|
||||
scale = atof(argv[3]);
|
||||
else
|
||||
scale = 0;
|
||||
|
||||
if(argc > 4)
|
||||
offset = atof(argv[4]);
|
||||
else
|
||||
offset = 0;
|
||||
|
||||
nmapdata = FS_LoadFile(infile, &nmaplen);
|
||||
if(!nmapdata)
|
||||
{
|
||||
printf("FS_LoadFile failed\n");
|
||||
return 2;
|
||||
}
|
||||
nmap = LoadTGA_BGRA(nmapdata, nmaplen);
|
||||
free(nmapdata);
|
||||
if(!nmap)
|
||||
{
|
||||
printf("LoadTGA_BGRA failed\n");
|
||||
return 2;
|
||||
}
|
||||
nmap_to_hmap(nmap, image_width, image_height, scale, offset);
|
||||
if(!Image_WriteTGABGRA(outfile, image_width, image_height, nmap))
|
||||
{
|
||||
printf("Image_WriteTGABGRA failed\n");
|
||||
free(nmap);
|
||||
return 2;
|
||||
}
|
||||
free(nmap);
|
||||
return 0;
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user